Answer to Question #288116 in Physics for Kev

Question #288116

a 25 N block is pushed up a plane inclined 30° with the horizontal by a force F of 46 N applied parallel to the plane. The block moves 3.0 m up the plane. the coefficient of friction is 0.2 find the work done by: a. gravity b. force c. friction force d. normal force


1
Expert's answer
2022-01-18T10:24:42-0500

a) The work done by gravity:


"W=mgh=75\\text{ J}.\\\\"

b) The work done by force:


"W=Fd=F\\dfrac h{\\sin30\u00b0}=276\\text{ J}."


c) The work done by friction:


"W=\\mu mg\\cos30\u00b0=4.33\\text{ J}."


d) The work done by the normal force is 0.


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